Sperm penetration of pig eggs in relation to the timing of ovulation and insemination.
D000818:Animals; D004971:Estrus / Q000502:physiology; D005321:Extraembryonic Membranes; D005260:Female; D005306:Fertilization / Q000502:physiology*; D007315:Insemination, Artificial / Q000662:veterinary*; D008297:Male; D010060:Ovulation / Q000502:physiology*; D010063:Ovum; D011247:Pregnancy; D013094:Spermatozoa / Q000502:physiology*; D013552:Swine / Q000502:physiology*; D013997:Time Factors